Roll No. Answer Sheet No.

Sig. of Candidate. Sig. of invigilator.

CHEMISTRY CLASS 9

SECTION A (Marks 50)

NOTE:Section 'A' is compulsory. All questions carry equal marks. Select the choice which you think is correct with Marker or Pen
ink.Deleting / overwriting is not allowed.Do not use a lead pencil.
Q. 1 Alcohol in water is an example of a _____ solution. (1)

A. liquid-gas B. gas-liquid C. liquid-liquid D. none of these

Q. 2 Carbon dioxide in carbonated drinks is an example of a _____. (1)

A. solvent B. solute C. solution D. none of these

Q. 3 Sara has two solutions that contain sodium acetate dissolved in water. She wants to determine whether the (1)
solutions are supersaturated or unsaturated. How can she solve this problem?

I. By adding a crystal of sodium acetate in both II. By adding a crystal of sodium thiosulfate in both
solutions. solutions.
III. By adding more water in both solutions.

A. I only B. II only C. III only D. I and III only

Q. 4 The given diagram shows an area covered in fog. (1)

Fog is a solution of

A. gas in liquid. B. liquid in gas. C. solid in liquid. D. liquid in liquid.

Q. 5 The given table shows the classification of substances based on their solubility in water. (1)

Soluble Insoluble

I Benzene Magnesium hydroxide

II Potassium sulphate Magnesium hydroxide

III Benzene Carbon tetrachloride

IV Potassium sulphate Carbon tetrachloride

The option that shows the correct classification of these substances is

A. I and II B. I and III C. II and IV D. III and IV

Q. 6 Butter is an example of a _____ solution. (1)

A. gas-gas B. liquid-solid C. solid-solid D. none of these

Q. 7 Arshad dissolves 28 grams of KOH in 1 dm3 of water. Its molarity will be _____. (1)

A. 0.1 M B. 0.5 M C. 0.2 M D. 1 M

Q. 8 Fog is a mixture of air and _____. (1)

A. dust B. water vapours C. gas D. carbon particles

Q. 9

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The given diagram shows a chromatogram of several inks. (1)

Based on the given chromatogram, it can be inferred that

A. red and blue inks are present in brown ink B. yellow and blue inks are present in black ink
C. black is a mixture of blue, red and green inks D. brown is a mixture of red, green and black inks

Q. 10 A 10% v/m alcohol solution contains _____ of alcohol in a 100 ml solution. (1)
3
A. 10 cm B. 90 g C. 90 ml D. 100 g

Q. 11 Which of the following is the correct formula for finding the percentage concentration (v/m) of a substance? (1)

A. mass of solute B. mass of solvent

× 100 × 100
volume of solute volume of solution

C. volume of solute D. volume of solute

× 100 × 100
mass of solution mass of solvent

Q. 12 The solubility of _____ salt decreases with the increase in temperature. (1)
3 3 2 4
A. KNO B. NaNO C. Li SO D. KCl

Q. 13 A student mixed a solute in a solvent and made a mixture. After 15 minutes, he observed that the solute had settled (1)
down. He would call this mixture _____.

A. a true solution B. a colloidal solution C. a homogenous solution D. a suspension

Q. 14 The maximum mass of solute that dissolves in 100 grams of a solvent is known as its _____. (1)

A. molarity B. concentration C. solubility D. percentage

Q. 15 An aqueous solution is formed when _____. (1)

A. a substance dissolves completely in water B. a substance dissolves partially in water

C. a substance suspends in water D. a substance sediments in water

Q. 16 After adding 50g of salt in 500ml of water, salt particles begin to appear, making the solution _____. Ayesha, (1)
however, heats the solution to 65℃ and notices that the salt begins to dissolve. The solution has now become
_____.

A. saturated; supersaturated B. unsaturated; saturated C. supersaturated; D. saturated; unsaturated

unsaturated

Q. 17 A student mixed a solute in a solvent and made a mixture. After 15 minutes, they observed that the solute had (1)
settled down. They call this mixture a _____.

A. a true solution B. a colloidal solution C. a homogeneous mixture D. a suspension

Q. 18 You are given two mixtures: A and B. You can see particles in A but not in B. Both A and B scatter light. Which of the (1)
following statements is correct?
I. A is a suspension but B is a colloid. II. A is a homogenous mixture but B is a
heterogenous mixture.
III. Both A and B are homogeneous mixtures.

A. I only B. II only C. I and II only D. I and III only

Q. 19 If 16 g of sodium chloride is dissolved in water to prepare 200 cm3 of saline solution, the mass/volume (m/v) (1)
percentage of sodium chloride solution will be

A. 0.07 B. 0.08 C. 7.41 D. 8.00

Q. 20 You are given a heterogenous mixture. What can be concluded using only this information? (1)

A. It is not a solution. B. It is not a colloid. C. It is not a suspension. D. There is not enough

information given.

Q. 21

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Which of the following predictions is WRONG about the solubility of substance X in substance Y? (1)

A. A B. B C. C D. D

Q. 22 When a saturated solution is diluted, it becomes _____. (1)

A. a supersaturated solution B. a neutral solution C. a concentrated solution D. an unsaturated solution

Q. 23 In a 2.50 M H2 SO4 solution, the concentration of H+ ions is _____ and SO4 −2 is _____. (1)

A. 1.25 M; 1.25 M B. 2.50 M; 2.50 M C. 5.00 M; 2.50 M D. 2.50 M; 5.00 M

Q. 24 Which of the following differences between solution and suspension is INCORRECT? (1)

Solution Suspension

A It passes through the filter paper. It leaves residue on filtration.

B It forms homogeneous mixture. It forms heterogeneous mixture.

C It does not show Tyndall effect. It may show Tyndall effect.

D It appears translucent. It appears transparent.

A. A B. B C. C D. D

Q. 25 _____ light is scattered more strongly than red light by the Tyndall effect. (1)

A. Violet B. Magenta C. Blue D. White

Q. 26 If 10 cm3 of alcohol is dissolved in water such that the total mass of the resulting solution is 100g, this is _____ (1)
solution of alcohol in water.

A. 10% m/m B. 10% w/v C. 10% v/m D. 10% v/v

Q. 27 Which of the following is an example of a liquid-gas solution? (1)

A. gold B. mist C. ice D. dust

Q. 28 In a 0.18 M FeCl3 solution, the concentration of Fe+3 ions is _____ and Cl− is _____. (1)

A. 0.045 M; 0.135 M B. 0.135 M; 0.045 M C. 0.54 M; 0.18 M D. 0.18 M; 0.54 M

Q. 29 Which of the following is the correct formula for finding the percentage concentration (v/v) of a substance? (1)

A. volume of solute B. mass of solute

× 100 × 100
mass of solution volume of solution

C. volume of solute D. volume of solute

× 100 × 100
volume of solvent volume of solution

Q. 30 Which of the following statements about the types of solutions is/are true? (1)

I. Supersaturated solutions contain undissolved II. Saturated solutions cannot dissolve more solute.
solute. III. Unsaturated solutions contain dissolved solute.

A. I only B. III only C. II and III only D. I, II, and III

Q. 31 A student mixed a solute in a solvent and made a mixture. After 15 minutes, the student observed that the solute (1)
had settled down. They call this mixture _____.

A. a true solution B. a colloidal solution C. a homogenous solution D. a suspension

Q. 32 Which of the following is not an example of aqueous solution? (1)

A. Black tea B. Sea water C. Orange juice D. Whipped cream

Q. 33 Concentration is the ratio of a _____. Powered by Knowledge Platform (1)

 A. solvent to a solute B. solvent to a solution C. solute to a solution D. solute to a solute

Q. 34 _____ is an example of suspension. (1)

A. Blood in water B. Lemon juice in water C. Ink in water D. Sand in water

Q. 35 What is the molarity of a solution containing 32 g of potassium sulphate (K2 SO4 ) in 350 cm3 of solution?(Note: (1)
−1
Molar mass of K2 SO4 = 174 g mol )

A. 0.06 M B. 0.09 M C. 0.52 M D. 64.37 M

Q. 36 Which of the following statements defines a solution? (1)

A. A pure compound having one or more solutes dissolved in B. A heterogeneous mixture having one or more solutes
a solvent dissolved in a solvent
C. A homogeneous mixture having one or more solutes D. A pure compound having a solute and a solvent mixed in a
dissolved in a solvent fixed ratio by mass

Q. 37 Ionic compounds dissolve in _____. (1)

A. benzene B. water C. ether D. diesel

Q. 38 Soda is an example of a carbonated drink that contains sugar, water, and carbon dioxide. Which substances are (1)
solutes and solvents?

Option Sugar Carbon dioxide Water

A solvent solute solvent

B solute solvent solvent

C solute solute solvent

D solvent solvent solute

A. A B. B C. C D. D

Q. 39 A teacher asks a student to dissolve 2.5 g of sodium carbonate in 50 g of water. What will be the concentration of (1)
the prepared solution?

A. 4.76 % B. 5.00 % C. 47.6 % D. 95.2 %

Q. 40 Brass is a solid-solid solution which consists of Zinc and _____. (1)

A. carbon B. magnesium C. calcium D. copper

Q. 41 Which of the following is NOT an example of aqueous solution? (1)

A. Black tea B. Sea water C. Orange juice D. Whipped cream

Q. 42 Shown below is a picture of three beakers (A, B, and C) that contain salt solutions (blue) before and after the (1)
addition of 0.25g of more salt (white).

Which of the following options correctly identify the state of the solutions A, B, and C after the addition of more
salt?

A. option I B. option II C. option

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Platform D. option IV
Q. 43 A solution that has room to dissolve more solute at a given temperature than it currently holds is called a/an _____. (1)

A. saturated solution B. unsaturated solution C. supersaturated solution D. aqueous solution

Q. 44 A scientist prepared sugar solution in a sequence as shown below. He started dissolving sugar at room temperature (1)
and then raised the temperature to dissolve an excess amount. The solution was then cooled to a temperature
where the scientist observed crystal formation.

The solution Z which favoured the formation of crystals is said to be a/an

A. colloidal solution. B. saturated solution. C. unsaturated solution. D. supersaturated solution.

Q. 45 A student, for his research, prepared 1.25 M potassium chloride stock solution. What volume of the stock solution (1)
will he use to further prepare a 250 mL dilute solution of 0.2 M?

A. 40 mL B. 50 mL C. 62.5 mL D. 250 mL

Q. 46 Sara has three mixtures, A, B, and C. She passes them through both ordinary and ultrathin filter papers. She records (1)
her observations about whether the particles passed or did not pass through both filter papers in the table shown
below.

filter paper A B C

ultrathin did not pass did not pass passed

ordinary passed did not pass passed

Which option correctly indicates the type of mixtures A, B, and C were based on this information?

options A B C
I solution colloid suspension
II suspension solution colloid
III colloid suspension solution
IV suspension colloid solution

A. I B. II C. III D. IV

Q. 47 Which of the following is a polar solvent? (1)

A. benzene B. water C. ether D. petrol

Q. 48 A scientist prepares 0.125 M sodium chloride stock solution. What volume of the stock solution is required to (1)
prepare a 100 mL dilute solution of 0.05 M?

A. 20 mL B. 40 mL C. 60 mL D. 100 mL

Q. 49 Generally, solubility of salt increases with the increase in _____. (1)

A. mass of salt B. volume of solvent C. pressure of solvent D. temperature of solvent

Q. 50 Which of the following solutions is most dilute? (1)

A. 1 M B. 2 M C. 0.1 M D. 0.009 M

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